Method paintRowThumbnail

Telegram/SourceFiles/boxes/stickers_box.cpp:1505–1559

}

void StickersBox::Inner::paintRowThumbnail(
		Painter &p,
		not_null<Row*> row,
		int left) {
	const auto origin = Data::FileOriginStickerSet(
		row->set->id,
		row->set->accessHash);
	if (row->set->hasThumbnail()) {
		if (!row->thumbnailMedia) {
			row->thumbnailMedia = row->set->createThumbnailView();
			row->set->loadThumbnail();
		}
	} else if (row->sticker) {
		if (!row->stickerMedia) {
			row->stickerMedia = row->sticker->createMediaView();
			row->stickerMedia->thumbnailWanted(origin);
		}
	}
	validateAnimation(row);
	const auto thumb = row->thumbnailMedia
		? row->thumbnailMedia->image()
		: row->stickerMedia
		? row->stickerMedia->thumbnail()
		: nullptr;
	const auto paused = _show->paused(ChatHelpers::PauseReason::Layer);
	const auto x = left + (_st.photoSize - row->pixw) / 2;
	const auto y = _st.photoPosition.y() + (_st.photoSize - row->pixh) / 2;
	if (row->lottie && row->lottie->ready()) {
		const auto frame = row->lottie->frame();
		const auto size = frame.size() / style::DevicePixelRatio();
		p.drawImage(
			QRect(
				left + (_st.photoSize - size.width()) / 2,
				_st.photoPosition.y() + (_st.photoSize - size.height()) / 2,
				size.width(),
				size.height()),
			frame);
		if (!paused) {
			row->lottie->markFrameShown();
		}
	} else if (row->webm && row->webm->started()) {
		p.drawImage(
			x,
			y,
			row->webm->current(
				{ .frame = { row->pixw, row->pixh }, .keepAlpha = true },
				paused ? 0 : crl::now()));
	} else if (thumb) {
		p.drawPixmapLeft(
			x,
			y,
			width(),
			thumb->pix(row->pixw, row->pixh));
	}
}

void StickersBox::Inner::validateLottieAnimation(not_null<Row*> row) {
	if (row->lottie